Main unit software issue/corrupt

[Krasnowski]

Hi I've got a audio a4 b8 and I recently tried to update the software and it didn't work now the unit has crashed and is stuck on the update menu and I can't do anything, the unit always stays on even if the car is off. I tried to restart the unit and it didn't do anything also cleared any error codes with an odb11 and nothing still the same issue and got the error code of 150 on the screen. Is there anything I can try that isn't buying a new unit?
 

[Steve Q]

Might sound daft, but you could always try pulling the fuse, as long as you've got the radio code. In failing that you could speak to any auto electrician or Audi specialist. You could go to Audi but they'll want big bucks.